the full sequence didn't work, I'm back to :
#!/bin/bash
echo 1 > /proc/sys/kernel/sysrq
echo s > /proc/sysrq-trigger
echo u > /proc/sysrq-trigger
echo b > /proc/sysrq-trigger
Thanks for confirmation
Wanted to know if it doesnt work on my test rig only or else ...
Added your suggestion for next release (your name included)
sysrq_reboot pull request